Patent US5231047A successfully refreshed from Google Patents.
US4977490A
Expired / Lapsed
US
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Fluorescent light fitting and system
Assignee: FIFTH GENERATION TECHNOLOGY (MANUFACTURING) Ltd A CORP OF GREAT BRITAIN
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Filing: 1989-02-27
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Granted: 1990-12-11
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Expires: 2009-02-27
Abstract
Abstract A fluorescent light fitting (1) comprises an elongate metal casing (2) of hollow cross-section with spaced-apart fluorescent tube holders (6) projecting from at least one wall (5) of the casing (2) and with another wall (4) of the casing provided with a removable or releasable baseplate (14) on which internal electrical components (13) are mounted, with means (18, 19, 20) to fasten the baseplate (14) to the fitting (1).
Inventors
- 👤 John H. Davies
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:35
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/04; F21S8/06; F21S8/03; F21S8/031; F21V; F21V21/00; F21V23/00; F21V23/02; F21V23/06; F21Y; F21Y2103/00; F21Y2113/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
139 words
A fluorescent light fitting comprising an elongate metal casing of hollow cross-section comprising an upper wall, a pair of spaced-apart sidewalls spacing said upper wall from a lower wall parallel to said upper wall, spaced-apart fluorescent tube holders projecting from an external surface of each of said sidewalls, said sidewalls being angled downwardly to define an acute angle, a movable baseplate provided on said lower wall, electrical control components mounted on said baseplate, and fastening means to fasten and release said baseplate to its wall, with said components normally located internally of said casing when said baseplate is in its fastened position, and with said components temporarily exposed for servicing when said baseplate is released, and with said electrical components carried indirectly by said baseplate, being mounted on an exchangeable gear tray, in turn releasably attached to said baseplate.
Claim 2
Dependent Claim
139 words
A fluorescent light fitting comprising an elongate metal casing of hollow cross-section comprising an upper wall, a pair of spaced-apart sidewalls spacing said upper wall from a lower wall parallel to said upper wall, spaced-apart fluorescent tube holders projecting from an external surface of each of said sidewalls, said sidewalls being angled downwardly to define an acute angle, a movable baseplate provided on said lower wall, electrical control components mounted on said baseplate, and fastening means to fasten and release said baseplate to its wall, with said components normally located internally of said casing when said baseplate is in its fastened position, and with said components temporarily exposed for servicing when said baseplate is released, and with said electrical components carried indirectly by said baseplate, being mounted on an exchangeable gear tray, in turn releasably attached to said baseplate.
Claim 3
Dependent Claim
19 words
A fluorescent light fitting as claimed in claim 1, wherein said fastening means is of a quick release type.
Claim 4
Dependent Claim
25 words
A fluorescent light fitting as claimed in claim 1, wherein said fastening means is a winged stud rotatable through 90° between fastening and non-fastening positions.
Claim 5
Dependent Claim
35 words
A fluorescent light fitting as claimed in claim 3, wherein said fastening means is captivated to said fitting, and an aperture is provided in said baseplate, and said fastening means is engageable with said aperture.
Claim 6
Dependent Claim
49 words
A fluorescent light fitting as claimed in claim 4, wherein one end of said baseplate is provided with said aperture and a projecting tongue is provided at the other end of said baseplate, with an inner portion of said casing being provided with means engageable by said projecting tongue.
Claim 7
Dependent Claim
29 words
A fluorescent light fitting as claimed in claim 1, wherein said baseplate is hinged to said casing, to provide a drop-down releasable baseplate when said fastening means is released.
Claim 8
Dependent Claim
20 words
A fluorescent light fitting as claimed in claim 1, wherein said baseplate is removable from said fitting when said fastening
Claim 9
Dependent Claim
25 words
A fluorescent light fitting as claimed in claim 1, wherein said a quick-release fastening means serves to attach releasably said gear tray to said baseplate.
Claim 10
Dependent Claim
16 words
A fitting as claimed in claim 8, wherein said fastening means comprises 90° rotatable winged studs.
Claim 11
Dependent Claim
21 words
A fluorescent light fitting as claimed in claim 1, wherein said casing is formed as an integral pressing from sheet metal.
Claim 12
Dependent Claim
16 words
A fluorescent light fitting as claimed in claim 1, wherein said casing is of unit length.
Claim 13
Dependent Claim
34 words
A fluorescent light fitting as claimed in claim 11, wherein said casing terminates in an end wall, by the use of which end wall adjacent ends of adjacent casings are butted and secured together.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |